Problem is I can't get through a magazine with the original or the new one without a mis-feed. Apparently, its very common and there are several tools on the market to help adjust the mags but I can't get them to work.

Follow these instructions. Since High Standards don't have feed ramps, the tuning of the magazines to the ammo is key to getting the round to hit the chamber. Too tight and the round hits too low. Too loose and it hits above the chamber and you have a jam.